Management

We have tried 5 different scenarios:

  • RFMb: rotation forest management with thinning from below (Scenario 1)
  • RFMa: rotation forest management with thinning from above (Scenario 2)
  • CCF: Continious cover management (Scenario 3)
  • RFMa + CCF: one of these two appoaches (Scenario 4)
  • AAF: Any age forestry (Scenario 5)

We have optimized without and with net income contrains. The net income constrain was calculated per area as the mean net income for each discount rate across the 10 periods and the five scenarios.

Study areas

The study area is located in Liperi and it contains 12 different areas.

[I will add here some description of the different areas]

Results

Wood production

Figure 1: The mean total wood volume production across the 12 areas

Main points:

  • The mean total wood volume production across the 12 areas was higher when the management was continious cover forestry with rotation foresty with thinnings from above (scenario 4) and the lowest for the rotation forestry with thinning from below (scenario 1).
  • There was not significant differences between constrained and uncostrained optimization across the 12 area or scenarios.

Figure 2: Total wood production by area

Roundwood volume

Figure 3: Roundwood volume, the solid lines represent the mean values across the 12 study areas, and the shadowed areas represent the variation.

Main points:

  • Management with unconstrained and constrained net incomes show that the volume trends changes by management approach (scenario), and that the roundwood volumes were higher throughout the whole period when the management was continious cover forestry (Scenario 3), and lowest when the management was rotation forestry with thinning from below (Scenario 1).
  • Any aged forestry produced higher mean roundwood when the managements was constrained than when it was uncontrained.
  • There was higher differences in roundwood volumes between scenarios when the net income was unconstrained than when it was constrained.
  • The mean differences between the 5 management aproaches are more evident when the management is uncosntrained. It is hard to differenciate between the different scenario treatments as the variation is overlaping across the whole period, specially when the net income was constrained.

Figure 4: Trends of roundwood volume per area with unconstrained net income

Figure 5: Trends of roundwood volume per area with constrained net income

Carbon balance

Figure 6: Total mean carbon balance across the 12 areas and their variation

Figure 7: Carbon balance, the solid lines represent the mean values across the 12 study areas, and the shadowed areas represent the variation.

Figure 8: Trends of carbon balance per area with unconstrained net income

Figure 9: Trends of carbon balance per area with constrained net income

Carbon stock

Here we are showing the carbon stock per ha of forest products, trees, and soil. The soil carbon ploted only includes the carbon from mineral soils and aerobic peat. Anaerobic peat was not plotted because their values are too big.

The 80% (I have to confirm this value) of the soil carbon is located in the anaerobic peat.

Figure 10: Mean carbon stock by scenario across the 12 areas.

Economic revenues

Figure 11: Total mean net income across the 12 areas and their variation as the sum of all the net incomes obtained for each of the 10 periods.

Figure 12: Net income, the solid lines represent the mean values across the 12 study areas, and the shadowed areas represent the variation.

Figure 13: Net income per area with unconstrained net income

Figure 14: Net income per area with constrained net income

Figure 15: The mean and variation NPV across the 12 areas

Clear felling area

Figure 16: Total mean clear felled area across the 12 areas and their variation as the sum of all the areas clearfelled in each of the 10 periods.

Figure 17: Clear felled area, the solid lines represent the mean values across the 12 study areas, and the shadowed areas represent the variation.

Figure 18: Clear felled area per area with unconstrained net income

Figure 19: Clear felled area per area with constrained net income

Shannon index

Figure 20: Mean value for the Shannon index per scenarion across the 12 areas and 10 periods.

Old forest index

Figure 21: Mean value for the Economically old forest index per scenario and across the 12 areas and 10 periods.

Broadleaves volume

Figure 22: Mean broadleaves volume per scenario and across the 12 areas and 10 periods.

Dry biomass deadwood

Figure 23: Mean dry biomass deadwood per scenario and across the 12 areas and 10 periods.

Comparison between scenarios

Figure 24: Comparison of the mean total values per ha scaled to values between 0 and 1, across the 12 areas (NPV 3%), Umconstrained.

Figure 25: Comparison of the values per area, NPV3% Unconstrained

Figure 26: Comparison of the values per area, NPV3% Constrained